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I believe the answer to your questions is "yes", sort of. The Harvester is a demo, and we have not made any effort to monitor or otherwise evaluate the collections and records added to it. But just the same, it does have quite a bit of real information stored in it. We've talked internally about what to do with it here and there, and chances are we'll take it down in the near future; but we're not sure just yet if we'll try replacing it with another curated harvester for specifically OxS content or not.

There are many examples of OHS online; for example, see http://asiajol.info/ (which isn't the newest release but is fairly close to what you can expect). Of course, you won't be able to explore the administration side of it.